public static WindowsIdentity GetAnonymousIdentity()
{
SafeCloseHandle tokenHandle = null;
bool flag = false;
lock (lockObject)
{
if (anonymousIdentity == null)
{
try
{
try
{
if (!SafeNativeMethods.ImpersonateAnonymousUserOnCurrentThread(SafeNativeMethods.GetCurrentThread()))
{
int error = Marshal.GetLastWin32Error();
throw System.ServiceModel.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new Win32Exception(error, System.ServiceModel.SR.GetString("ImpersonateAnonymousTokenFailed", new object[] { error })));
}
flag = true;
if (!SafeNativeMethods.OpenCurrentThreadToken(SafeNativeMethods.GetCurrentThread(), TokenAccessLevels.Query, true, out tokenHandle))
{
int num2 = Marshal.GetLastWin32Error();
if (!SafeNativeMethods.RevertToSelf())
{
num2 = Marshal.GetLastWin32Error();
System.ServiceModel.DiagnosticUtility.FailFast("RevertToSelf() failed with " + num2);
}
flag = false;
Utility.CloseInvalidOutSafeHandle(tokenHandle);
throw System.ServiceModel.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new Win32Exception(num2, System.ServiceModel.SR.GetString("OpenThreadTokenFailed", new object[] { num2 })));
}
if (!SafeNativeMethods.RevertToSelf())
{
System.ServiceModel.DiagnosticUtility.FailFast("RevertToSelf() failed with " + Marshal.GetLastWin32Error());
}
flag = false;
using (tokenHandle)
{
anonymousIdentity = new WindowsIdentity(tokenHandle.DangerousGetHandle());
}
}
finally
{
if (flag && !SafeNativeMethods.RevertToSelf())
{
System.ServiceModel.DiagnosticUtility.FailFast("RevertToSelf() failed with " + Marshal.GetLastWin32Error());
}
}
}
catch
{
throw;
}
}
}
return(anonymousIdentity);
}
public static WindowsIdentity GetAnonymousIdentity()
{
SafeCloseHandle tokenHandle = null;
bool isImpersonating = false;
lock (lockObject)
{
if (anonymousIdentity == null)
{
try
{
try
{
if (!SafeNativeMethods.ImpersonateAnonymousUserOnCurrentThread(SafeNativeMethods.GetCurrentThread()))
{
int error = Marshal.GetLastWin32Error();
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new Win32Exception(error, SR.GetString(SR.ImpersonateAnonymousTokenFailed, error)));
}
isImpersonating = true;
bool revertSuccess;
bool isSuccess = SafeNativeMethods.OpenCurrentThreadToken(SafeNativeMethods.GetCurrentThread(), TokenAccessLevels.Query, true, out tokenHandle);
if (!isSuccess)
{
int error = Marshal.GetLastWin32Error();
revertSuccess = SafeNativeMethods.RevertToSelf();
if (false == revertSuccess)
{
error = Marshal.GetLastWin32Error();
//this requires a failfast since failure to revert impersonation compromises security
DiagnosticUtility.FailFast("RevertToSelf() failed with " + error);
}
isImpersonating = false;
Utility.CloseInvalidOutSafeHandle(tokenHandle);
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new Win32Exception(error, SR.GetString(SR.OpenThreadTokenFailed, error)));
}
revertSuccess = SafeNativeMethods.RevertToSelf();
if (false == revertSuccess)
{
int error = Marshal.GetLastWin32Error();
//this requires a failfast since failure to revert impersonation compromises security
DiagnosticUtility.FailFast("RevertToSelf() failed with " + error);
}
isImpersonating = false;
using (tokenHandle)
{
anonymousIdentity = new WindowsIdentity(tokenHandle.DangerousGetHandle());
}
}
finally
{
if (isImpersonating)
{
bool revertSuccess = SafeNativeMethods.RevertToSelf();
if (false == revertSuccess)
{
int error = Marshal.GetLastWin32Error();
//this requires a failfast since failure to revert impersonation compromises security
DiagnosticUtility.FailFast("RevertToSelf() failed with " + error);
}
}
}
}
catch
{
// Force the finally to run before leaving the method.
throw;
}
}
}
return(anonymousIdentity);
}